.bigImgWrap{
  width: 500px;
  height: 500px;
  position: relative;
  background: #e2e2e2;
  .toAfter{
    position: absolute;
    top: 234px;
    right: 0;
    z-index: 2;
    cursor: pointer;
    font-size: 32px;
  }
  .toBefore{
    position: absolute;
    top: 234px;
    left: 0;
    z-index: 2;
    cursor: pointer;
    font-size: 32px;
  }
}
.bigImgDiv{
  width: 500px!important;
  height: 500px!important;
  display: flex!important;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  img{
    max-width: 100%;
    max-height: 100%;
  }
}